Aerosys TTWC Condensers: Models, Specs & NYC Compatibility

Why Aerosys

The Go-To Through-Wall Condenser for NYC Buildings

If you’ve been shopping for a through-wall condenser in New York, you’ve probably noticed the options are limited. Most major HVAC manufacturers don’t make condensing units sized for the 36″ x 19″ wall sleeves that NYC buildings use. They build for rooftop installs, outdoor pad installs, or mini-split applications — none of which help when you’re replacing a unit in a concrete sleeve on the 22nd floor of a co-op on the Upper East Side.

Aerosys is one of the few companies that actually designs condensers around this constraint. Their TTWC (Through-The-Wall Condenser) line is built from the ground up to slide into a standard NYC wall sleeve, connect to an indoor air handler via refrigerant lines, and deliver real cooling capacity — not the underpowered output you get from a hotel-room PTAC.

We’ve installed hundreds of Aerosys units across Manhattan, Brooklyn, and the Bronx. They’re reliable, they fit, and they don’t give us callbacks. That’s about the best endorsement a contractor can give.

Standard vs LX Series: What’s the Real Difference?

Aerosys sells each tonnage in two versions: Standard and LX. People ask us about this constantly, so here’s the straight answer.

The Standard series uses the same reliable Aerosys compressor and condenser coil in a straightforward package. It cools the apartment, it runs quiet, and it’ll last you years. If your unit isn’t running 18 hours a day or you’re in a north-facing apartment that doesn’t get hammered by afternoon sun, the Standard model is all you need. Save the money.

The Aerosys LX series steps up the internal components — better fan motor, upgraded electrical contacts, and components rated for heavier duty cycles. The LX is what we recommend for south-facing units, top-floor apartments with direct sun exposure, or large open-plan living spaces where the AC runs hard from May through September. It’s built to handle being on all day, every day, during a NYC summer.

Both series use R-410A refrigerant, both fit the same 36x19 condenser sleeve, and both connect to the same indoor air handlers. The LX just gives you more headroom for demanding installations.

All 6 Aerosys TTWC Models Compared

Here’s the full Aerosys through-wall condenser lineup with pricing, capacity, and our recommendation for each.

Sizing an Aerosys Condenser for Your NYC Apartment

Tonnage isn’t a guess — it’s based on square footage, sun exposure, ceiling height, and how many windows you’re dealing with. Here’s the quick version for typical NYC apartments:

These are starting points. Sun exposure and floor height can push you up a size — a 650 sq ft south-facing apartment on the 30th floor might need 2.0 tons, not 1.5. Read our full sizing guide for the detailed breakdown with electrical requirements.

Installing Aerosys Condensers in NYC Buildings

Every Aerosys TTWC unit runs on 208-230V, single-phase, 60Hz power. That matches the standard electrical service in NYC residential high-rises, so you’re not running new wiring from the panel in most cases. You will need a dedicated circuit — typically 20A for 1.5-ton units and 30A for 2.0 and 2.5-ton models. Check the nameplate data for the specific model.

The condenser slides into the 36″ x 19″ wall sleeve from inside the apartment. It connects to an indoor air handler (fan coil unit) via copper refrigerant lines — a liquid line and a suction line that run through the wall. This is a split system, so installation requires a licensed HVAC technician with EPA 608 certification to handle the refrigerant charge. Your building super can’t do this one.

Most NYC co-ops and condos require board approval before any HVAC work begins. That means an alteration agreement, proof of insurance from your contractor, and sometimes engineering drawings. Don’t skip this step — buildings will fine you and potentially make you rip out unauthorized work. Our co-op and condo approval guide walks through the entire process.

Installation typically takes 4–6 hours for a straightforward swap where the sleeve, electrical, and air handler mount are already in place. New installations where you’re running lines and mounting a new air handler can take a full day.

Aerosys vs NCP vs AboveAir: How They Compare

Aerosys isn’t the only game in town for 36x19 through-wall condensers. We also carry National Comfort Products (NCP) and AboveAir, and each has its strengths.

NCP has been in the NYC through-wall market the longest. Building managers who’ve been specifying equipment for 20 years know the NCP name. Their units are solid, parts availability is good, and many buildings have NCP written into their alteration agreements as an approved brand.

AboveAir tends to compete on price and availability. If you’re doing a bulk replacement for an entire building line and need units fast, AboveAir is worth quoting.

Aerosys hits the middle ground — competitive pricing, the Standard/LX tier system that lets you match the unit to the application, and good build quality. For individual apartment replacements, we find ourselves recommending Aerosys more often than not. The LX series in particular gives you a premium option without jumping to a different brand.

Quick Reference

Key Specs at a Glance